Troubleshooting - Yamaha XF50W Service Manual

EAS00808

TROUBLESHOOTING

• The coolant temperature indicator light
fails to indicate.
• The coolant temperature indicator light
fails to indicate when the engine is warm.
Check:
1. main fuse
2. battery
3. main switch
4. coolant temperature sensor
5. wiring connections
(the entire cooling system)
NOTE:
8 Before troubleshooting, remove the follow-
ing part(s):
1. battery cover/front cover
2. side cover(right)
3. front fork upper cover
4. front fork cover(left and right)
5. leg shield1,2
6. footrest board
8 Troubleshoot with the following special
tool(s).
Pocket tester
90890-03112
YU-03112-C
EAS00738
1. Main fuse
• Check the fuse for continuity.
Refer to "CHECKING THE FUSE" in chap-
ter 3.
• Is the fuse OK?
YES
V
4 NO
Replace the fuse.
COOLING SYSTEM
EAS00739
2. Battery
• Check the condition of the battery.
Refer to "CHECKING AND CHARGING
THE BATTERY" in chapter 3.
II
Minimum open-circuit voltage
12.8 V or more at 20°C (68°F)
• Is the battery OK?
YES
V
EAS00749
3. Main switch
• Check the main switch for continuity.
Refer to "CHECKING THE SWITCHES".
• Is the main switch OK?
YES
V
8-43
ELEC
4
NO
• Clean the battery ter-
minals.
• Recharge or replace
the battery.
4
NO
Replace the main
switch.
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